Introducción

Miglio, Viola

doi:10.19130/iifl.ap.1995.1-2.552

Cited by 2 publications

(2 citation statements)

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“…Both academia and industry have been extensively investigating direct synthesis, with a large number of studies being continuosly published [1][2][3][4][5][6][7][8]. However, the main effort in the direct synthesis is still focused on the synthesis of new catalysts [2,[9][10][11][12][13] that can reduce or avoid the parallel and consecutives reaction involved in the reaction to form H 2 O 2 ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Continuous H2O2 direct synthesis over PdAu catalysts

Biasi¹,

Menegazzo²,

Pinna³

et al. 2011

Chemical Engineering Journal

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a b s t r a c t H 2 O 2 direct synthesis over two bimetallic, palladium-gold catalysts based on sulfated ceria (PdAu-CeS) and on sulfated zirconia (PdAu-ZS) has been studied in a continuous, trickle-bed reactor, at −10• C and 10 bar. Three different liquid flow rates and seven different gas flow rates were used. The combined effect of liquid and gas flow rates, with two different H 2 /O 2 ratio (2/18 and 4/16) in the gas feed, has been studied, by independent variations. The highest H 2 /O 2 ratio always increases production rate and selectivity. In the case of 4/16 ratio, PdAu-CeS catalyst shows an enhancement in selectivity only, while the increase in H 2 O 2 production rate is not significant compared to the 2/18 ratio case. PdAu-ZS catalyst shows a remarkable gain in both selectivity and production rate when the 4/16 ratio in gas feeding is used, outperforming the PdAu-CeS catalyst. The enhancement of the catalytic activity is more pronounced in the case of PdAu-ZS, compared to PdAu-CeS, when the highest H 2 /O 2 ratio is used. A selectivity up to 90% has been measured on PdAu-ZS with the higher H 2 /O 2 ratio and larger liquid flow rates. The maximum production rate measured is 6 mol/min (i.e. a productivity 0.18 mol H 2 O 2 g Pd −1 h −1 ) with 1 ml/min liquid flow rate and 2.7 ml/min gas flow rate again on PdAu-ZS.

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Section: Introductionmentioning

confidence: 99%

Continuous H2O2 direct synthesis over PdAu catalysts

Biasi¹,

Menegazzo²,

Pinna³

et al. 2011

Chemical Engineering Journal

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“…151 In addition, another engineering problem that should be considered is how to separate the additives (acid, halides and heavy metals) from the final H 2 O 2 product. 163…”

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confidence: 99%